MESON Chess Problem Database
Problem Display
PID: 89804 (1n6/7B/r4p1K/2BNkP2/1pnRNp1Q/3P1R2/6p1/2b5 w - - 0 1)
Fjellstrom, Zakarias
Die Schwalbe, 1961
#2
10 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qxf6#
- 1...Ra2
- 2.Qxf6#
- 1...Ra3
- 2.Qxf6#
- 1...Ra4
- 2.Qxf6#
- 1...Ra5
- 2.Qxf6#
- 1...Ra7
- 2.Qxf6#
- 1...Ra8
- 2.Qxf6#
- 1...Bb2
- 2.Qxf4#
- 1...Ba3
- 2.Qxf4#
- 1...Sd2
- 2.Qxf4#
- 1...Se3
- 2.Qxf4#
- 1...Sb6
- 2.Qxf6#
- 1...Sd6
- 2.Qxf6#
- 1...Sc6
- 2.Qxf6#
- 1...Ra1
- Tries
- 1.Sd2?
- threat
- 2.Sxc4#
- 2.Qxf4#
- 1...Sxd2
- 2.Qxf4#
- 1...Sb2
- 2.Qe1#
- 2.Qxf4#
- 1...Sa3
- 2.Qe1#
- 2.Qxf4#
- 1...Se3
- 2.Qxf4#
- 1...Sa5
- 2.Qe1#
- 2.Qxf4#
- 1...Sb6
- 2.Qe1#
- 2.Qxf6#
- 2.Qxf4#
- 1...Sd6
- 2.Qxf6#
- 2.Qxf4#
- 1...Bxd2!
- threat
- 1.Sec3?
- threat
- 2.Re4#
- 1...Sd2
- 2.Qxf4#
- 1...Sd6
- 2.Qxf6#
- 1...bxc3!
- threat
- 1.Sd6?
- threat
- 2.Sxc4#
- 2.Sf7#
- 2.Qxf6#
- 1...Sxd6
- 2.Qxf6#
- 1...Ra7
- 2.Sxc4#
- 2.Qxf6#
- 1...Sb2
- 2.Sf7#
- 2.Qxf6#
- 1...Sd2
- 2.Sf7#
- 2.Qxf6#
- 2.Qxf4#
- 1...Sa3
- 2.Sf7#
- 2.Qxf6#
- 1...Se3
- 2.Sf7#
- 2.Qxf6#
- 2.Qxf4#
- 1...Sa5
- 2.Sf7#
- 2.Qxf6#
- 1...Sb6
- 2.Sf7#
- 2.Qxf6#
- 1...Sd7
- 2.Sxc4#
- 2.Sf7#
- 1...Rxd6!
- threat
- 1.Se3?
- threat
- 2.Sxc4#
- 2.Sg4#
- 2.Rd5#
- 2.Qxf4#
- 1...Sxe3
- 2.Qxf4#
- 1...fxe3
- 2.Qg3#
- 2.Qh2#
- 2.Qf4#
- 1...g1Q
- 2.Sxc4#
- 2.Rd5#
- 2.Qxf4#
- 1...g1R
- 2.Sxc4#
- 2.Rd5#
- 2.Qxf4#
- 1...Rd6
- 2.Sxc4#
- 2.Sg4#
- 2.Qxf4#
- 1...Sb2
- 2.Sg4#
- 2.Rd5#
- 2.Qxf4#
- 1...Sd2
- 2.Sg4#
- 2.Rd5#
- 2.Qxf4#
- 1...Sa3
- 2.Sg4#
- 2.Rd5#
- 2.Qxf4#
- 1...Sa5
- 2.Sg4#
- 2.Rd5#
- 2.Qxf4#
- 1...Sb6
- 2.Sg4#
- 2.Qxf6#
- 2.Qxf4#
- 1...Sd6
- 2.Sg4#
- 2.Rd5#
- 2.Qxf6#
- 2.Qxf4#
- 1...Bxe3!
- threat
- 1.Sxb4?
- threat
- 2.Rd5#
- 1...Se3
- 2.Qxf4#
- 1...Sb6
- 2.Qxf6#
- 1...Rd6!
- threat
- 1.Sxf4?
- threat
- 2.Rd5#
- 1...Bxf4+
- 2.Qxf4#
- 1...Se3
- 2.Sg6#
- 1...Sb6
- 2.Qxf6#
- 1...Rd6!
- threat
- 1.Sb6?
- threat
- 2.Sxc4#
- 2.Rd5#
- 2.Qxf6#
- 1...Sxb6
- 2.Qxf6#
- 1...Sb2
- 2.Rd5#
- 2.Qxf6#
- 1...Sd2
- 2.Rd5#
- 2.Qxf6#
- 2.Qxf4#
- 1...Sa3
- 2.Rd5#
- 2.Qxf6#
- 1...Se3
- 2.Qxf6#
- 2.Qxf4#
- 1...Sa5
- 2.Rd5#
- 2.Qxf6#
- 1...Sd6
- 2.Rd5#
- 2.Qxf6#
- 1...Sd7
- 2.Sxc4#
- 2.Sxd7#
- 2.Rd5#
- 1...Rxb6!
- threat
- 1.Sdxf6?
- threat
- 2.Rd5#
- 1...Rxf6+
- 2.Qxf6#
- 1...Se3
- 2.Qxf4#
- 1...Sb6
- 2.Sg4#
- 1...Rd6!
- threat
- 1.Sc7?
- threat
- 2.Rd5#
- 1...Se3
- 2.Qxf4#
- 1...Sb6
- 2.Qxf6#
- 1...Rd6!
- threat
- 1.Se7?
- threat
- 2.Rd5#
- 1...Se3
- 2.Qxf4#
- 1...Sb6
- 2.Qxf6#
- 1...Rd6!
- threat
- 1.Re3?
- threat
- 2.Qxf4#
- 1...fxe3
- 2.Qg3#
- 2.Qh2#
- 2.Qf4#
- 1...f3
- 2.Qg3#
- 2.Qh2#
- 2.Qf4#
- 1...Bxe3!
- threat
- 1.Sd2?
- Keys
- 1.Sexf6!
- threat
- 2.Re4#
- 1...Rxf6+
- 2.Qxf6#
- 1...Sd2
- 2.Qxf4#
- 1...Sd6
- 2.Sg4#
- threat
- 1.Sexf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 12
- Sets
- R(g);N_GUARD::QAB1(E),XP(h)
- B(a);N_GUARD::QAB1(E),XP(e)
- S(d);S_CUTB(a)::QAB1(E),XP(e)
- S(d);S_CUTR(g)::QAB1(E),XP(h)
- S(i);S_CUTR(g)::QAB1(E),XP(h)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- S(d);XS(D)::QAB1(E),XP(e)
- S(d);::QAB1(E),XP(e)
- Refutation
- B(a);XS(D)
- Try
- S(D);
- Threat
- R1(C)
- Vars
- S(d);S_CUTB(a)::QAB1(E),XP(e)
- S(d);S_CUTR(g)::QAB1(E),XP(h)
- Refutation
- P(c);XS(D)
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- S(d);XS(D)::QAB1(E),XP(h)
- Refutation
- R(g);XS(D)
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- S(d);XS(G)::QAB1(E),XP(e)
- Refutation
- B(a);XS(G)
- Try
- S(G);XP(c)
- Threat
- R1(C)
- Vars
- S(d);S_CUTB(a)::QAB1(E),XP(e)
- S(d);S_CUTR(g)::QAB1(E),XP(h)
- Refutation
- R(g);
- Try
- S(G);P_SPINS(G),XP(e)
- Threat
- R1(C)
- Vars
- B(a);CHECK,OGATE,XS(G)::QAB1(E),XB(a)
- S(d);N_PINS(G)::S(G)
- S(d);S_CUTR(g)::QAB1(E),XP(h)
- Refutation
- R(g);
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- S(d);XS(G)::QAB1(E),XP(h)
- Refutation
- R(g);XS(G)
- Try
- S(G);P_SPINS(G),XP(h)
- Threat
- R1(C)
- Vars
- R(g);CHECK,OGATE,XS(G)::QAB1(E),XR(g)
- S(d);S_CUTB(a)::QAB1(E),XP(e)
- S(d);N_PINS(G)::S(G)
- Refutation
- R(g);
- Try
- S(G);
- Threat
- R1(C)
- Vars
- S(d);S_CUTB(a)::QAB1(E),XP(e)
- S(d);S_CUTR(g)::QAB1(E),XP(h)
- Refutation
- R(g);
- Try
- S(G);
- Threat
- R1(C)
- Vars
- S(d);S_CUTB(a)::QAB1(E),XP(e)
- S(d);S_CUTR(g)::QAB1(E),XP(h)
- Refutation
- R(g);
- Try
- R(B);
- Threat
- QAB1(E),XP(e)
- Refutation
- B(a);XR(B)
- Try
- Actual
- S(D);P_SPINS(D),XP(h)
- Threat
- R1(C)
- Vars
- R(g);CHECK,OGATE,XS(D)::QAB1(E),XR(g)
- S(d);S_CUTB(a)::QAB1(E),XP(e)
- S(d);N_PINS(D)::S(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).